[time-nuts] PRS-45A is alive!

[paul swed]

Bob
That is one nice looking unit. Most Cs's that we get have had there days.
This one looks really good physically. The fact that it warmed and locked
in 16 minutes means it did not need to pump down very much. Heck a small RB
takes 15 minutes to hit lock and it has a much smaller mass to heat up.
Congratulations on a great buy.
Regards
Paul
WB8TSL

On Tue, Dec 9, 2014 at 8:29 AM, Dave Martindale <dave.martindale at gmail.com>
wrote:

> One zero-effort way to do this: a portable GFCI.
>
> I have several GFCIs (Ground Fault Circuit Interrupters) designed for
> portable use.  They may be in the form of an extension cord with the GFI
> electronics in the male plug, or a short cord with the electronics in the
> middle of the length, or a small block that plugs into an outlet, with a
> female outlet that a device plugs into.  All of these portable GFCIs
> require line power to remain in the "on" position.  If the AC is
> interrupted briefly, the GFCI drops out and stays off until manually reset.
>
> This must be by design, because it is different from the behaviour of GFCI
> outlets, and GFCI circuit breakers.  It mimics the behaviour of latching
> magnetic contactors (relays) used on large AC-powered tools.  I use the
> portable GFCIs to get the same shut-off-and-stay-off feature for small shop
> tools that are equipped only with an ordinary switch.  A portable GFCI
> should work just as well for electronics that you want to stay off until
> manually reset.
>
> - Dave
>
> On Tue, Dec 9, 2014 at 1:24 AM, wb6bnq <wb6bnq at cox.net> wrote:
>
> > Hi Bob,
> >
> > I think using a latching relay is a very good idea and prudent.  Besides
> > while it is reacquiring lock you would probably be busy resetting VCR's
> and
> > so forth.
> >
> > Bill....WB6BNQ
> >
> >
> > Bob Stewart wrote:
> >
> >   Hi Pete,
> >> I don't have any way of knowing.  I've asked the seller if he has a copy
> >> of the control software, and I don't like to go back with a bunch of
> petty
> >> questions like that.  The next issue is adapting some serial port
> software
> >> i wrote to the protocol in the manual Magnus sent to see if I can pull
> the
> >> status codes out.  That would probably tell me something.
> >> I have some tests I want to run immediately on my GPSDO and the KS to
> >> settle the question of which one can't keep time.  After that, I'll
> power
> >> it down, lift its skirts and take some pics.  It's pretty simple on the
> >> surface: a Cs Beam Tube, a main board, a microwave package with MTI 5Mhz
> >> OCXO, and the HV and LV power supplies.
> >> I don't intend to keep this thing running 24/7, but I have a question:
> >>  Here in Houston, we have the occasional large thunderstorm and
> resulting
> >> short power outages.  So, should I put a latching relay in the power
> stream
> >> to keep it off if I lose power?  The budget is now officially busted,
> and a
> >> UPS is not going to happen for awhile.  Santa's sleigh is now officially
> >> out of gas.
> >> Bob
> >>      From: Pete Lancashire <pete at petelancashire.com>
> >> To: Bob Stewart <bob at evoria.net>; Discussion of precise time and
> >> frequency measurement <time-nuts at febo.com> Sent: Monday, December 8,
> >> 2014 11:46 PM
> >> Subject: Re: [time-nuts] PRS-45A is alive!
> >>   Love to have known how long it was off, and how much of that 16
> >> minutes was getting the tube degassed.
> >>
> >> -pete
> >>
> >>
> >>
> >> On Mon, Dec 8, 2014 at 7:11 PM, Bob Stewart <bob at evoria.net> wrote:
> >>
> >>
> >>> Well, it's alive, and I even have 10MHz coming from it.  It took about
> >>> 16 minutes to go to lock.  Is that good, or doesn't matter?  Now I've
> got
> >>> to put together a serial cable and see if I can talk to it and find
> out how
> >>> it thinks it's doing.  But, this is good!
> >>>
> >>>
> >>> www.evoria.net/AE6RV/PRS-45A/2014-12-08%2020.51.33.jpg
> >>>
> >>> Hope you enjoy the wall decorations.  =)
> >>>
> >>> Bob - AE6RV
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